Pump



Sept. 6, 1927., 1,8417? G. J. WELTER I PUMP I Fil ed May 13, 1925 Q 4 Shets-Sheef 1 I'NVENTOR:

G. f- Wegier.

A TTORNEY S.

Sept- 6, 1927. 1,641,717

' G. J. WELTER PUMP i Filed May 15,1925 4 Sheets-Sheet 2 INVENTOR.

G J- weiz-en ATTORNEY Sept. 6, 1921,

G. J. W ELTER PUMP Filed May 15, 1925 4 Sheets-Sheet 5 'IN V EN TOR.

G- Welter, I u- ATTORN s.

Se t. 1927.

(5. J. \I VELTERv BUMP Filed May 13 1925 4 Sheets-She et INVENTOK' I mat-er. BY

' ATTORNEYS.

Patented Sept. 6, 1927.

T nt? GEORGE J; WELTER, OF TIFFIN, OHIO.

PUMP.

Application filed. May 13, 1925. Serial No. 30,011.

This invention relates to pumps and the primary object is to provide an easily operated double-acting pump by the use of which liquid may be drawn from a source of supply and delivered at "a point of use in a continuous stream. The invention also has for its object the provision of means whereby the pressure in the pump may be noted at all times and will be maintained substantially uniform. Another object of the invention is to provide means whereby liquid which'may accumulate in some of the pump passages will be returned to the inlet end of the pump-so as to relieve the pres sure and prevent waste of the liquid. Other objects of the invention wil appear inci dentally in the course of the following de- .scription, and, the invention resides in cer-.

tain novel features which will be particularly pointed out in the appended claims. In the drawings; V

Figure 1 is a side elevation 01 a pump embodying my invention; p

F 2 is a vertical longitudinal section through the cylinder; f:

Fig. 3 is a transverse vertical section on the line 33 of Fig. 1; m

Fig; 4 is a transverse vertical section on the line Jrl of Fig. 1; I

Fig. 5.is an end view of a portion of the receiving or intake end of the pump;

Fig. 6 is a vertical section on the line 66 of Fig. 1, and s Fig. 7 is a transverse section on the line 77 of Fig. 1.

In the drawings, the reference numeral 1 indicates a bed plate which may be of any approved form and dimensions and is provided at one end with a post 2 having a bearing formed longitudinally through its upper end, the said bearing being lined by a bushing ,3 to which lubricant may be supplied trom an oil cup 41 and being adapted to receive and support and guide the outer end of the piston rod 5. Adjacent the post 2 an opening is provided through the bed plate 1 and on the under side of the bed plate adjacent the ends of the said opening are :tormedbosses 6 adapted to' receive and retain a fulcrum pin 7 whereby. the operatingfleverB mayfbe supported for rocking the said members so that the spaced relation movement. The lever 8 may conveniently a wooden bar of any approved length but not mounted directly upon the fulcrum pin 7 To properly mount the lever upon the said fulcrum pin, the lower tapered end 9 thereof is fitted within a socket 10 which, as shown most clearly in Figs. 2 and 7, cons sts of mating members 11 having their bores or channels 12 downwardly tapered so that the lower tapered end' of tlie levermay ht snugly therein. To secure the socket members in snugly clamping relation to the lever, clamping bolts 13 are fitted through the upper endsot the socket members and serve to firmly secure them together in an obvious manner. Below the lever, .a bolt 14 is in-' serted through the socket members and through a spacing sleeve15 disposed between 7o the members willbe maintained and their tendencyto bend under strain will becounteracted. A similar bolt 16 and spacer sleeve 17 is provided near the lower ends of the socket members and the lower BXtTGB'llties of saidmembers are flared to extend through the opening in the bed plate and are provided below the opening with ears 18 encircling the fulcrum pin 7 so that the lever may rock upon said pin. Thesocket members, of course, pass at opposite 'sides of the piston rod 5 and, between thesaid members, a sleeve 19 is fitted upon the piston rod and is secured thereto by a pin 20 inserted diametrically through the sleeve and the rod, as clearly shown in Fig. "2. The said sleeve is provided on its sides with trunnions 21 which play in slightly elongated openings 22 in the lever whereby,

when the lever is oscillated, a reciprocatory movement will be imparted to the piston rod without causing binding of the lever upon the rod or the fulcrum sleeve.

Upon the bed plate near the end thereof remote from the post 2 are erect-ed and se- 5- cured the heads 23 and 24 which are of very similar construction and have their opposed faces recessed, as indicated at 25, to receive the ends for" the cylinder 26. Packing 27 of any approved type is placed within the recesses 25 against the ends of the cylinder so that 'when the' parts are secured. together,

leak-proof joints will be provided. To secure the cylinder in engagement with the r spective heads, clamping bolts 28are inserted through lugs or bosses 29 provided therefor upon the respective heads and equipped with nuts whereby, when the nuts are turned home, the heads will be firmly clamped together against the ends of the cylinderv lrvithin the cylinder is provided a piston consisting of a central disk 30, against the opposite faces of which are placed cup washers 31 of any suitable flexible material, other washers 32 of metal or other rigid material being placed against the outer faces 01 the flexible cup Washers. The piston rod 5 e3;-

that they prevent the flow of liquid past the piston and, consequently. they will ettectually operate to draw liquid into the cylinder upon one stroke and will then force the liquid from the cylinder upon the op posite stroke. Bot-h heads'23 and 24 are provided at their lower edges with lateral feet 37 adapted to rest flat upon the bed plate, and cap screws or bolts 38 are insert ed through the several feet into the bed plate to rigidly secure the heads in place. It Wlll be understood that the heads are as embled with the cylinder and the piston before being bolted. to the bed plate and that the feet upon the respective heads have openmgs therethrough which are somewhat elongated to permit such slight adjustment of the heads longitudinally of the bed plate as may be necessary to effect the required rigid assemblage of all the parts.

The head 24 is the receiving head of the pump and its inner face is provided with a shallow recess 39 communicating with the recess whereby the liquid may readily flow into and out of the cylinder. Above the said recess 39,- the head has formed thereon a vertically disposed barrel oryalve casing 40 having its bore 41 communicating directly with the recess 39 through the end of a transverse channel 42. The bore 41 is expanded in its upper portion to provide a. beveled valve seat 43 and a disk valve 44 normally rests upon the said seat, being yieldably held thereto by a spring 45 arranged between the valve and a cap plug 46 threaded into the upper end of the barrel 40. An outlet port 47 is formed in the side of the barrel 40 immediately above the valve seat 43 and this port opens directly into a nipple or elbow 48 formed upon the side of the barrel, as shown. In the end of 'the nipple or elbow 43 is secured one end of an outlet pipe 49, the opposite end of which is connected with the delivery pipe 50 through couplings 51, as shown clearly in Fig. 3. Between the ends of the pipe 49. an air chamber or equalizing dome 52 is mounted and is in constant communication with the interior of the pipe so that water which may rise within the dome will trap the air therein and, through the. reacting pressure of the air, will be caused to How from the delivery pipe 50in an even constant stream. A pressure gage 53 of any approved form is mounted upon the dome 52 and is in communication with the interior of the same.

The transverse channel 42 extends across the bottom or lower end of the barrel 40 and opens into an inlet barrel 54 formed upon the head 24 and having one end of the supply pipe 55 secured in its lower end. The

channel 42 enters the barrel 54 immediately above thevalve seat 56 formed therein, and a disk valve 57. corresponding to the valve 44, is yieldably held to said seat by a spring 58 corresponding to the spring 45 and held within the barrel by a cap plug 59. From the description thus far given, it will be seen that, when the piston moves away from the head 24, a partial vacuum will be formed between the same and the valves 44 and 57, as a result of which action the valve 44 will be held seated and the valve 57 will open under the pressure of the water against the tension of the spring 58. The water or other liquid will then obviously flow past the valve 57 through the channel 42 and enter the cylinder. Upon the reverse stroke of the piston, the liquid will-he compressed against the valve 57 which will be thereupon seated and the pressure exerted through the liquid will lift the valve '44 from its seat, whereupon the liquid will pass out through the port 47 into the pipe 49 and thence flow through the delivery pipe to the point of use. 7

The head 23 is constructed with a shallow transverse channel 60 corresponding in all GSSGIItlR-laI'QSPGCtS to the channel 42 of the head 24 whereby communication is established between the head 23 and the adjacent end of the cylinder. At one end, the channel 60 opens into the lower end of a barrel 61 in which is mounted a valve 62 corresponding in all respects to the valve 44 and held in place by a spring 63 and cap plug 64. Above the valve 62, the barrel 61 is provided with an outlet port 65 communicating directlywith the bore of a boss 66 formedv upon the side of the head and directed toward the opposite end of the cylinder. Apipe 67 has one end secured in the said boss- 66 ,and has its opposite end secured in a nipple '68 on the side of the elbow or coupling 48 on the head 24:, thereby.

connecting the discharge sides of the two heads so that the liquid forced out by either stroke of the pistonwill be driven into the pipe 49 and thence'fiow to the delivery pipe -50. The head 23 is also tormedwith a barrel 69 having a valve. seat 70 therein and has its frontendv fitted in a nipple formed on the barrel 54s or the head 24 at the lower end of the said barrel 5%. This pipe 74 constitutes the inlet pipe. for the head 23 and it will thus be seen that upon either stroke or" the piston liquid is drawn into one end of the cylinder through the head connected therewith and is simultaneously discharged from the opposite end of the cylinder through the adjacent head. I thus attain a constant flow through the delivery pipe and, as all of the outfiowing liquid must pass the pressure dome, the pressure or force of the discharging liquid will be practically uniform.

Connected with the lower coupling 51, by which the dome pipe i9 is connected to the discharge pipe 50,,is an overflow pipe 75 which leads into a casing 76 which houses an overflow or pressure-regulating valve of any approved type. Extending from the lower side of the casing 76 is a drain pipe 77 which has a horizontal branch 78 extending into the barrel 54 at the lower end thereof. Should the pressure of the outfiowing liquid rise above a predetermined point, the regulatingvalve will be opened and the excess liquid will then flow through the pipes 75, 77 and 78 back to the. inlet end of the barrel 5% so that. it will be returned to the circulating system while the strain upon the discharge pipe and the co acting parts will be very effectually relieved.

Fronrthe foregoing description, taken in connection with the accompanying drawings, it will be seen that I have provided a very compact double-acting pump whereby liquid may be discharged under a considerable pressure without excessive strain upon the part of the operator. Moreover, while I have illustrated and specifically described a lever to be operated by hand for driving the pump, it will be understood that any approved means for reciprocating the piston and piston rod may be employed. The form of hand-open ating mechanism herein shown and described is very eflicient inasmuch as it is so mounted as to equalize the strain and thereby avoid bending or twisting of any of the parts and the piston rod.

itwill operate directly upon the piston rod.

Furthermore, it may be very easily and" quickly assembled with the bed plate and Particular attention. is invited to the fact thatthe, valves which control the flow of liquid into and from the cylinder all operateautomaticallyand are easily accessible inasmuch as, in order to remove anyj valve, it. is necessary merely to withdraw the cap plug above the same, whereupon the spring and the valve may lifted from its seat and any cleaning or re grinding which may be needed may be performed without requiring dismantling of the entire pump. The respective heads and the passages by which the liquid is directed to and from the ends of the cylinder may be formed by a single casting operation and the two heads and the cylinder may be very easily and quickly secured together in operative relation and in such manner as to prevent leakage, It is also to be noted that the outer free end of the piston rod is supported and guided by the post upon the bed plate and, consequently, bending and binding of the piston rod is not apt to occur. In the outer side 0:? each head is a drain opening 79 which is closed by a screw plug 80 and the said opening communicates directly with the re spective channels l2 and 60 to permit drainage of the same when necessary.

Having thus described the, invent-ion, I claim:

1. A pump comprising an open-ended tubular cylinder, heads for the ends of said cylinder, each having its inner face-formed with a recess constituting a seat to receive an adjacent end of the cylinder and a transversely extending pocket having its intermediate portion communicating with the cylinder, valve chambers extending upwardly from the end portions of said pocket, one

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being formed with a depending inlet neck and the other with an outlet neck extending transversely therefromintermediate its ends, pipes connecting the necks of the valve chain bers of one head with the necks of correiii) sponding valve chambers of the other head,

the ends of said pipes beingremovably engaged with the valve chamber necks, draw rods extending between and engaged with said heads to releasably retain the heads in engagement with the ends of said cylinder and pipes, upwardly opening valves in said valve chambers normally closed and control.- ling passage of fluid through the inlet and outlet necks, and removable closures for the upper ends of said valve chambers.

2. A pump comprising an open-ended tubular cylinder, heads for said cylinder, each head having its inner face formed with a seat to snugly receive an end portion of said cylinder and with atransversely extending shallow pocket having its intermediate portion communicating with the cylinder and liii) extended outwardly to form a neck portion necks to provide communication between formed with side arms, valve chambers exsaid heads, draw bolts extending between tending upwardly from the end portions of and engaged with said. heads to firmly but said side arms, one chamber having an outreleasably hold the heads in operative enlet neck extending transversely therefrom gagement with the ends of said cylinder and 5 and the other extended downwardly to form pipes, and upwardly opening check valves in an inlet neck, said necks being formed with said chambers to control passage of fluid side arms, pipes extending longitudinally of through the same. y the cylinder at opposite sides thereof with In testimony whereof I aflix my signature.

1 their ends fitted into the side arms of said GEORGE J. WELTER. [L. s] 

